Would really love additional channel layouts such as 7.1.4 and 9.1.6. This content is downloadable from more labels now, and of course on blu-ray for ripping. I have a 250 albums stored as 7.1.4 twelve channel WAV files and I can’t use them with Roon, so I rarely use Roon anymore.
Would love to see this added though and would probably start using it again if I could play all my music.